[ISSUE #7481] Remove invalid key/value in logPolling map (#7481)

[yp969803]

Which Issue(s) This PR Fixes

Fixes #7481

Brief Description

Removed invalid key/value in logPolling map

How Did You Test This Change?

using mvn test

[yp969803]

@joeCarf can you verify this pr?

[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (7e17867) 43.13% compared to head (b6a6839) 43.18%.

Files	Patch %	Lines
...tmq/broker/longpolling/PullRequestHoldService.java	40.00%	2 Missing and 1 partial :warning:

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #7670      +/-   ##
=============================================
+ Coverage      43.13%   43.18%   +0.04%     
  Complexity      9800     9800              
=============================================
  Files           1165     1165              
  Lines          84480    84486       +6     
  Branches       10967    10969       +2     
=============================================
+ Hits           36442    36484      +42     
+ Misses         43518    43475      -43     
- Partials        4520     4527       +7     

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[yp969803]

@cserwen done